Nut-lock



(N0 Modem 0. ROHRBAGHI UT LOOK.

Patented May 5, 1896.

z d F wi/tmaoom @QW W v U emm UNITED STATES PATENT OFFICE.

CHARLES ROHRBAOH, OF CHESTER, PENNSYLVANIA.

NUT-LOCK.

SPECIFICATION forming part of Letters Iatent No. 559,464, dated May 5,1896.

Application filed October 16, 1894. Serial No. 526 ,07'7. (N0 model.)

To ctZZ whom it may concern:

Be it known that 1, CHARLES ROHRBACH, a citizen of the United States,residing at Chester, in the county of Delaware and State ofPennsylvania, have invented certain new and useful Improvements inNut-Locks; and I do hereby declare the following to be a full, clear,and exact description of the invention, such as will enable othersskilled in the art to which it appertains to make and use the same.

This invention relates to nut-locks in which a spring member is employedto.insure the tension of bolts used in securing articles or structures,and has for its object to compensate for the slack resulting from wearof the nut or bolt head and contiguous surfaces or by the unscrewing ordisplacing of the nut.

The invention consists in the peculiar construction of the washer and aspring member interposed between the washer and the nut.

In the drawings, Figure 1 is a side elevation of a railroad-rail withfishplate and my invention applied. Fig. 2 is a section on the line X X,Fig. 1. Fig. 3 is a top plan view of the spring member detached. Fig. 4is a side elevation of the same. Fig. 5 is a top plan view of thewasher, and Fig. 6 is a side elevation of the same.

Arepresents a suitable rail, B a fish-plate, and O a bolt.

D is a washer having a central aperture through which the'bolt passes.On each side of this aperture are grooves d, the sides of which slopeoutwardly from the bottom to the top of the washer. These grooves, whenthe washer is in proper position, are in a horizontal plane.

7 E is the spring member of myimproved lock, which is substantiallyU-shaped, and composed of highly-tempered spring-steel. The

arm 6 of the member E is bent upward, so that its normal position is ina higher plane than that of the arm 6. The end of the arm e is flattenedout and drawn to an edge, as at e thereby forming a head or enlargement.The arms of the spring members are of such thickness that they fitsnugly into the grooves din the washer, and the head or enlargement eprevents the said members from sliding out from under the nut F.

. The bolt being in place in the rail and fishplate, the washer isslipped over the bolt with the grooves in a horizontal plane, the springmember is placed in the grooves d and the nut F screwed down upon thewasher. In screwing the nut on it first engages the elevated arm e ofthe spring member, and as it is screwed in place it forces the arm 6back into its groove 01 in the washer.

The tendency of the arm e to spring upward against the bottom of the nutwill, in a measure, bind the threads in the nut against the threads ofthe bolt and thereby hold the nut firmly and prevent it from turning andbecoming accidentally loosened. The binding of threads caused by the arme will not be great enough to injure them.

What I claim, and desire to secure by Letters Patent, is-- In anut-lock, the combination of a Washer having horizontally-disposedflaring grooves, a lock consisting of a U shaped piece of spring metal,one arm of which is normally in a higher plane than the other andadapted to be forced into the same plane, a head formed on the end ofthe other arm, as described.

In testimony whereof I affiX my signature in presence of two witnesses.

CHARLES ROHRBACH. Witnesses:

FRED HOWARD, JOHN LONG.

